Bad to refuse tests?

A post made me remember this but , i hate needles . I'm 8 weeks and im refusing to get the TDAP & Flu Shot & the other tests to see if the kid will have asma and stuff . Did anyone else refuse shots ? I talked to my sister & she never even heard of the TDAP (for whooping cough for the baby) and she never had a flu shot or anything else . (mind you , she has 3 healthy children) ... Is it wrong to decline these ?